Unlock Negative Zone Costume
For this costume to appear in your game you must first change the 'Time' and 'Date' settings on your X360 to a month past August 2012. This must be done offline otherwise the X360 will change your date and time back to the correct time.
Click the link below if you need help changing the settings
http://support.microsoft.com/kb/906661
More tricks, tips and cheats for this game are right here - The Amazing Spider-Man cheats
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